Christie Roadie HD+35K User Manual page 30

Section 2: Installation and Setup
NOTES: 1)
Assumes full 2048 x 1080 display.
this may affect image quality.
between lenses described as having the same throw ratio, between projectors, and with any lens/projector
combination. 4) Simultaneous horizontal and vertical offset can limit the adjustment range of each, as can
long throw distances.
ALTERNATIVE METHOD OF DESCRIBING VERTICAL OFFSET
Offset can also be specified as the distance traveled from lens center (such as 270 pixels) and expressed as
a percentage (270 pixels=50%) of half of the image height. This concept of image movement is illustrated
in the example below:
For any projector, if you find that you cannot raise or lower the image enough using mechanical vertical
offset, try adjusting V-Position in the
size (see Section 3.6.3 Image Settings
projector may simply be too high or low in relation to the screen. Relocate for optimized performance.
Horizontal Position
The image can be offset horizontally (shifted left or right of lens center) by using the built-in keypad or the
standard IR remote. Starting with no offset, the 2048 x 1080 image from this projector can be moved by a
distance of up to ±35% of the image width (depending on the lens).
2-14
2)
3)
Due to manufacturing tolerances, an offset range can vary ±5% or more
50% Offset
Image moved by a distance of
50% of half the image height
Figure 2-15 Example of Alternative Offset Specification
Size and Position
Menu). If images remain keystoned or exhibit uneven brightness, the
Recommended offset range can sometimes be exceeded, however
lens center
menu when displaying at less than the minimum
75%
of image
25%
of image
Roadie HD+35K User Manual
020-100340-02 Rev. 1 (01-2010)